Modeling hints: I/O operations

Adds an example showing how to model I/O operation in SimGrid.
It uses data from real experiments on Grid'5000 to model the impact of
concurrent operation on disks and the variability/noise in single I/O
operations.

Adds an entry in the doc presenting the results.
The code is available at: docs/source/tuto_disk.

The rst file was generated from the analysis.org file.
The folder includes a dockerfile to rerun the experiment if needed.
4 jobs for master in 17 minutes and 26 seconds (queued for 10 seconds)
Status Job ID Name Coverage
  Build
passed ctest #1416640

00:14:55

passed pip #1416641

00:11:47

 
  Deploy
passed pages #1416642

00:02:31

passed pages:deploy

00:00:00